Smog Laws '74
Thread Starter
1st Gear
Joined: Aug 2002
Posts: 1
Likes: 0
From: Pasadena CA
Smog Laws '74
Anyone know the smog laws for 1974? I just had headers installed, and I'm trying to figure out where to get it smogged, and what sort of test I need. (Test only/sniff test...) I know it's usually on the renewal form, but my form never came. I have until the end of the month to smog it :confused:
*74girl*
*74girl*
Race Director
Joined: Jun 2002
Posts: 13,630
Likes: 0
From: Murfreesboro,TN
St. Jude Donor '03
Re: Smog Laws '74 (74girl)
Here’s a link that will answer all your questions. You missed it by two years! :cry
http://<a href="http://165.235.17.9/....asp&LB=NO</a>
http://<a href="http://165.235.17.9/....asp&LB=NO</a>
Race Director
Joined: Jun 2000
Posts: 10,045
Likes: 675
From: FL
Re: Smog Laws '74 (74girl)
Not sure about the sniffer test but Federal law states that it is illegal to remove any emmisions equipment that a vehicle was originally sold with whether or not it is tested.
Since you have a '74, you don;t have the dreaded 2-1-2 exhaust with a catlytic converter. Headers should be OK as long as they they have the required fittings. If you have an AIR pump, you need headers with AIR fittings. They are out there but cost $$$.
Probably not the answer you want, sorry.
Thank God no smog ***** up here. :cheers:
Since you have a '74, you don;t have the dreaded 2-1-2 exhaust with a catlytic converter. Headers should be OK as long as they they have the required fittings. If you have an AIR pump, you need headers with AIR fittings. They are out there but cost $$$.
Probably not the answer you want, sorry.
Thank God no smog ***** up here. :cheers:
Drifting
Joined: Feb 2001
Posts: 1,603
Likes: 0
From: San Francisco, CA
Re: Smog Laws '74 (74girl)
Yep, you need a smog check. The type depends partly on the area you live in, there is a stricter test in some areas that have pollution problems. In some areas under "Smog Check II" they put your car on a dynometer type thing and run it at various speeds to check the output. (Emissions not horsepower unfortunately.) I am no expert on '74's but I can't see why the headers would effect the sniff test unless in installing them you disconnected the AIR system which pumped air into you exhaust manifold. Assuming you can pass the sniff, you still have to pass the visual test, meaning the technician checks to see that everything is there and not altered - you may have a problem. But...don't panic. You may be smog exempt after this test as there is a rolling exemption for cars 30 years and older so... you may need to put the original stuff back on to pass, get through smog and then go full bore. What you may want to do is take it in and go for the test but be prepared to put it back to original if you fail. Guess why I know so much about this... :cry
Melting Slicks
Joined: Jun 2001
Posts: 2,340
Likes: 2
From: Moro IL
Re: Smog Laws '74 (74girl)
If the headers you installed are 50 state legal (meaning they have the AIR injection tubes) then your fine. If not you may need to reinstall your stock manifolds to be legal. If the 74 is not your daily driver then you may be able to get some sort of classic exemption. In Illinois your car has to be 25 years old to be eligible for this exemption, in California I have no idea, especially with the smog ****'s (internal cumbustion engine haters) out there.
:cheers:
Pat Kunz
:cheers:
Pat Kunz
Le Mans Master
Joined: Feb 2001
Posts: 7,226
Likes: 399
From: Northern CA
Re: Smog Laws '74 (Robert N)
The first thing they will do is look under the hood ... and under the car to do the visual inspection. Every stock smog item better be there or you'll fail even before they hook up the sniffer. If you get past that... they'll test for emissions, timing, and emission controls function. If you get past that then you've made it. But only for the next two years.
:crazy:
:crazy:
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
